Murfreesboro, a city in and the county seat of Rutherford County, Tennessee. The population was 108,755 according to the 2010 census, up from 68,816 residents certified during the 2000 census. The city is the center of population of Tennessee and is part of the Nashville metropolitan area, which includes thirteen counties and a population of 1,617,142 (2011). It is Tennessee's fastest growing major city and one of the fastest growing cities in the country. Murfreesboro is also home to Middle Tennessee State University, the largest undergraduate university in the state of Tennessee, with an undergraduate population of 22,299 and 25,188 total students as of 2009. source

Area codes 615 and 629 are area codes in Tennessee serving Nashville (Davidson County) and the 12 surrounding counties. 615 is the main area code, while 629 is an overlay covering the same area that will begin service in 2014. Besides Nashville, Murfreesboro, Franklin, Hendersonville, and Lebanon are other major cities in the 615/629 service territory. source